The wall.post method with the specified post_id clips attachments to 1, what should I do?

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Good day!
1) There is a suggested wall post in the group (with pictures attached)
Using the wall.get method with filter=suggests, I get the post_id of the suggestion post.
2) Using the wall.post method with the specified post_id, I create a delayed publication.
There are no error messages.
The entry is published, but only with 1 (first) picture attached, the rest of the pictures in the attachment are deleted. Such a nuisance ...
How to solve this problem?